Rotary pump



March 9, 1937.

c. JENNINGS ROTARY PUMP Filed Jan."19, 1954 J v "y N, w

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Patented Mag. 9; 1937 UNITED. STATES.

PATENT o F-ice The'obiect of this invention is t new and improved rotary liquid pump, particu-' larly adapted for pumping liquids at high pressure.

To this end the pump comprises-a casing having a chamber, a rotor turning therein and having peripheral buckets, and an inlet and outlet for directing the liquid peripherally to and front said buckets.

. 10 The chamber is shaped so that the rotor will 1 fit closely to a portion thereof, preferably a minor portion, and looselyto another portion thereof,

outlet are preferably arranged in' the same plane. By this construction a rotary pufnp is provided which can be operated efiiciently withverylittle friction at high speeds to generate a very high pressure. a The pump is illustrated in the accompanying sheet of drawings, in which Y Fig. '1 is a sectional elevation taken on the line II of Fig.--. 2, the cross matching of the rotor being omitted so th t the parts at the rear thereof can be shown by dotted lines.

Fig. 2 is a sectional elevation 'tak en on the line 2-2 of Fig. 2, and

Fig. 3-is an enlarged partial sectional elevation illustrating the operation.

Referring to the drawingandiin detail, A des--' ignates a circular casing which has suitable feet or supports to form the base of the structure. A chamber is formed in" the casing, this chamberhaving a major portion formed on one radius a and with a minor portion formed on a smaller.

radius a, as shown in (Fig. 1.

The base A is provided with arms B, which carry a bearing, preferably a ball bearing 0. A face plate or cover D is fitted axially into the 4 base A and secured thereto by bolts. The plate D is provided with arms E which carry a bearin F, preferably a ball bearing.--

A rotor or impeller G is arranged in the casing and is keyed or secured on a driving shaft H, which is fitted in the ball bearings C and F. Stufling boxes I and I are arranged in the casing A and the face plate D to pack the shaft G tightly in the chamber.

buckets -L. The bottoms of these buckets I are made semi-cylindricaLas at L, on axes parallel to the axis of the rotor as shown in Fig. 2. Preferably. a large number of buckets is employed.

v The rotor G is provided with forwardly pitched, preferably curved, blades J on its periphery, arranged between side partipipe line with very little pipe fitting. tions or shrouds K,- thus forming peripheral 'p'ciaim (Cl.1 0 3-96) provide a I e rotor fltsfcloselyto the M ofthe circular chamber of small diameter. Thecasing is provided with a supply passage'N which directs the incoming liquid into a passageway 0, to 'a chamber P. The .pump inlet Q extends from 5 said chamber- P and isarranged to direct the incoming liquid tangentially to the rotor.-

An outlet R is arranged tangentially in the" casing at about. the point where the chamber changes from large diameter to small diameter 10 so that the liquid will be discharged peripherally from the rotor. preferably a major portion, and the inlet and A series of holesS S is bored through the rotor. The operation is as follows, assuming that t fie rotor revolves in the directionindicated by t e arrows in Fig. -1 and Fig. 3. J I .As the buckets pass'the end of the section M- of the chamber, water will be drawn into the pump casing through the peripheral inlet Q by 'the action of the curved blades scooping into the 20 water, producing a forward rotating flow towards the outlet. The-water is scooped or drawn into a bucket, advanced and discharged into the peripheral chamber, where it is again caught and whirled along by the pressure side of the suc- 'ceeding bucket. This advances or forces the water around in the pump casing, bucket adding to the pressure. The'water rotates be-' As the bottoms of the buckets are made semicylindrical, this whirling action causes very little turbulence or friction.

1101953 3 2111 8 herotor or impeller v balance the same against any end thru t, 1 t

water leaks unequally between the sides of the a rotor and the casing. Thiadoes away with the need of tight fits between the sides of the rotor 4 and the casing A and plate D. 'I'he'only tight fit I that has to be considered is that between the periphery of the rotor and the section M of the chamber, and by making thisflt as close as possible without actual engagement of the parts, it 45 The .details and arrangements herein shown and described may be greatly varied by a skilled mechanic without departing fromthe. scope of my invention, as expressed in the claims.

Having thus fully described niy invention, what at.

desire aseerie by Letters Patent buckets are made substantially semi-cylindrical O adn axes parallel to the aids of the rotor, whereby a circulation of liquid to and from each of the buckets is produced through the plane of direction of rotationpf the rotor and an inlet and out-.

let for directing the liquid to and from said buckets. 2. Ina rotary 1i n of a casing: having a circular chamber formed on a major section of large diameter and am in'or 7 section "of smaller diameter a rotor turning therein I. and having shrouds and peripheral; buckets formed by forwardly pitched blades between said shrouds which bear peripherally only on the minor section, the g bottoms of which buckets are made substantially semi-cylindrical on ax'esparallel to the axis oi'the rotor, whereby a circulation oi liquid to and from each of the buckets is produced through the plane of direction of rotation of the rotor and an inlet, and outlet for directing .the liquid to and from saidbuckets. 3. ;In a rotary liquid pump, the oombinatiomoi a casing having a circular ehamber formed on amajor seotion oflarger diameter and a minor section of smaller diameter a rotor turning therein and having perlpheral bucketsformed by forwardly .tpitched blades which bear peripherally only oh the minor'section; the bottoms of which buckets are formed with a pronounced'curveture 4,0 in the plane of rotation of the rotor, and an inlet and outlet for directing the liquidto and from said buckets, said inlet being so disposed as to direct the liquid into the chamber substantially 1 at, and tangentially to, the periphery of ,the rotor in the direction ofrotation.

4.-Ina rotary liquid pump, the-combination. of a casing having a circular chamber formed :on a major, section-of large diameter and'a minor g'section oi. smaller diameter," a rotor. turning ,therein' and having shrouds and peripheral buckets formed by forwardly pitched blades between said shrouds which bear peripherally only ron the minor section, the bottoms of which,

buckets, are formed with a pronounced curvature in the plane of rotation of the rotor, and an in quid pump, the combination "shrouds which bear. peripherally "only on said 30 let and outl ior. directing the liquid to and from said buckets, said inlet belng so disposed as, to direct the liquid into the chamber substantially at, and tangentially to, the periphery of the rotor in the direction of rotation.

5. In a rotary pump, the combination oi! oi *pump chamber and a rotor revoluble therein, said chamber having a land of smaller diameter than that of "the chamber and positioned to closely cooperate with the periphery of the rotor, said rotor having peripheral buckets formed by forwardly. pitched blades which bear peripherally onlyon said land,,the backs of said blades being forwardly curved adjacent their peripheral edges to create a'reduction in pressure, thebottoms 01/ which buckets are formed with .a pronounced curvature in the plane of rotation of the rotor, and an inlet and outlet for directing the liquid to and from said chamber, said inlet being so alsposed as to-dirct the liquid intothe chamber substantially at, and tange'ntially to,v the pe-' riphery of the rotor in the direction of rotation.

g ,6. In a rotary pump, the combination of a pump :chamber and a rotor revoluble therein,

said chamber having a land of smaller: diameter 25 than that oi the, chamber and positioned to, closely cooperate with the periphery of the rotor, said rotor having shrouds and peripheral buckets formed by forwardly pitched blades between said,

said chamber having a land 9iv smaller diameterthan that of the chamber and positioned to l closely cooperate with the periphery of the 45 rotor, said'rotor having peripheral buckets formed by' forwardly pitched blades which bear'- peripherally only on said land,-the1 backs bi said bl ades being forwardly curved adjacent their pe- I pheral edges to create a reduction in pressure, I

'the'bottoms of. which buckets aremade substantially semi-cylindrical on axes parallel to the for I I IRVING 0. JENNINGS. '55' 

